On pg. 96 question 10 I’m confused with how you came up with the answer 6, I got the answer -15. How did you come up with 6 I don’t understand?

Same starting graph as the last post, new question:

Find the values of m and n by looking to the graph, which contains the points (6, -4) and (2, 1).

So m=-4 and n=1. Now, 3f(m-n) becomes 3f(-4-1)=3f(-5).

Go back to the graph—what’s f(-5)?

So f(-5)=2, which means 3f(-5)=3\times 2=6.

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